现代化GPS_Ⅲ星载原子钟时频特性分析  

Analysis of Time Frequency Characteristics of Modern GPS_ⅢSpaceborne Atomic Clock

作　　者：陈汗龙 王宇谱 蒋孝卿 李睿 周真帆 CHEN Hanlong;WANG Yupu;JIANG Xiaoqing;LI Rui;ZHOU Zhenfan(Beijing Satellite Navigation Center,P O Box 5128,Yongfeng Road,Beijing 100094,China)

机构地区：[1]北京卫星导航中心,北京市100094

出　　处：《大地测量与地球动力学》2025年第3期284-289,共6页Journal of Geodesy and Geodynamics

摘　　要：利用IGS发布的精密钟差数据,对已发射并在轨运行的6颗GPS_Ⅲ星钟的频率准确度、频率漂移率和频率稳定度等关键性能指标进行分析,并与前期GPS星钟进行对比。结果表明,GPS_Ⅲ搭载的铷钟整体运行稳定且数据质量较好,可能与抗干扰能力的提升有关,时频性能并无重大变化或明显不同,基本与上一代BlockⅡF铷钟一致,但频率稳定度更优,有助于提升PNT服务精度。研究成果可为其他GNSS系统空间段卫星的升级改造提供借鉴和参考。We use the precise clock offset data released by IGS to analyze the key performance indicators of six GPS-Ⅲsatellite clocks that have been launched and operated in orbit,including frequency accuracy,frequency drift rate,and frequency stability,and compare them with the previous GPS clocks.The results show that rubidium clocks carried by GPS-Ⅲare generally stable in operation and have good data quality,which is related to the improvement of anti-interference ability.There is no significant change or difference in time frequency performance,which is basically consistent with the previous generation BlockⅡF rubidium clocks.The frequency stability of GPS-Ⅲrubidium clocks are better,which helps to improve the accuracy of PNT services.The research can provide reference and guidance for the upgrading and transformation of other GNSS system satellites.

关 键 词：GPS_Ⅲ 星载原子钟 时频特性 频率稳定度 

分 类 号：P228[天文地球—大地测量学与测量工程]